Carbon　dioxide　plume　geothermal　system　(CPGS)　can　be　used　to　exploit　geothermal　energy　and　realize　carbon　dioxide　geological　sequestration　simultaneously.　The　thermal　compensation　from　the　rock　formation　around　the　geothermal　reservoir　is　one　of　the　important　factors　that　affect　the　performance　of　CPGS.　Based　on　a　three　dimensional　base　and　cap　rocks　enclosed　heat　reservoir　model,　the　influences　of　the　thermal　compensation　on　the　temperature　evolutionary　process　of　the　rock　and　fluid　in　the　geothermal　reservoir　and　the　heat　collection　performance　of　CPGS　were　studied.　The　distribution　of　geothermal　reservoir　temperature　and　the　temperature　of　production　fluid　were　compared　with　that　without　consideration　of　the　thermal　compensation.　The　results　show　that　the　thermal　compensation　reduces　both　the　production　fluid　temperature　variation　along　the　vertical　direction　and　its　temperature　decreasing　rate　in　the　later　period　of　system　operation,　therefore　extends　the　lifetime　of　CPGS　and　gains　better　heat　collection　performance.　With　consideration　of　the　thermal　compensation,　the　heat　production　is　improved　significantly.　The　results　also　show　that　the　thermal　compensation　of　the　base　rocks　is　stronger　than　that　of　the　cap　rocks.　©　All　Right　Reserved.